将图像从Google Cloud功能上传到云端存储

本文介绍了将图像从Google Cloud功能上传到云端存储的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试使用Google Cloud功能处理文件上传。此功能使用Busboy解析多部分表单数据，然后上传到Google Cloud Storage。

I'm attempting to handle file uploads using a Google Cloud Function. This function uses Busboy to parse the multipart form data and then upload to Google Cloud Storage.

我一直收到同样的错误：错误：{错误：ENOENT：没有这样的文件或目录，在触发函数时打开'/tmp/xxx.png'错误。

I keep receiving the same error: ERROR: { Error: ENOENT: no such file or directory, open '/tmp/xxx.png' error when triggering the function.

错误似乎是当storage.bucket.upload（文件）尝试打开文件路径 /tmp/xxx.png 。

The error seems to occur within the finish callback function when storage.bucket.upload(file) attempts to open the file path /tmp/xxx.png.

请注意，我无法按此问题，因为调用此应用程序的应用程序是外部非用户应用程序。我也无法直接上传到GCS，因为我需要根据一些请求元数据制作自定义文件名。我应该只使用Google App Engine吗？

Note that I can't generate a signed upload URL as suggested in this question since the application invoking this is an external, non-user application. I also can't upload directly to GCS since I'll be needing to make custom filenames based on some request metadata. Should I just be using Google App Engine instead?

功能代码：

const path = require('path'); const os = require('os'); const fs = require('fs'); const Busboy = require('busboy'); const Storage = require('@google-cloud/storage'); const _ = require('lodash'); const projectId = 'xxx'; const bucketName = 'xxx'; const storage = new Storage({ projectId: projectId, }); exports.uploadFile = (req, res) => { if (req.method === 'POST') { const busboy = new Busboy({ headers: req.headers }); const uploads = [] const tmpdir = os.tmpdir(); busboy.on('file', (fieldname, file, filename, encoding, mimetype) => { const filepath = path.join(tmpdir, filename) var obj = { path: filepath, name: filename } uploads.push(obj); var writeStream = fs.createWriteStream(obj.path); file.pipe(writeStream); }); busboy.on('finish', () => { _.forEach(uploads, function(file) { storage .bucket(bucketName) .upload(file.path, {name: file.name}) .then(() => { console.log(`${file.name} uploaded to ${bucketName}.`); }) .catch(err => { console.error('ERROR:', err); }); fs.unlinkSync(file.path); }) res.end() }); busboy.end(req.rawBody); } else { res.status(405).end(); } }

推荐答案

我最终放弃了使用Busboy。最新版本的Google Cloud Functions支持Python和Node 8.在节点8中，我只是将所有内容放入async / await函数中，它运行正常。

I eventually gave up on using Busboy. The latest versions of Google Cloud Functions support both Python and Node 8. In node 8, I just put everything into async/await functions and it works fine.